Hegde, Deepak; Herkenhoff, Kyle; Zhu, Chenqi - National Bureau of Economic Research - 2022
How does the publication of patents affect innovation? We answer this question by exploiting a large-scale natural … U.S. patents by two years. We obtain causal estimates by comparing U.S. patents subject to the law change with "twin …" European patents which were not. After AIPA's enactment, U.S. patents receive more and faster follow-on citations, indicating …